Disc retaining device



FIG. 1 is a perspective view showing a disc retaining device showing our new design;

FIG. 2 is a top plan view of FIG. 1;

FIG. 3 is a right side elevation view of FIG. 1; and,

FIG. 4 is a front elevation view of FIG. 1.

The broken lines are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for disc retaining device, as shown and described. 